This also happens when those items are spawned by CE in less than pristine state.
Affected entities have a DamageSystem config in one of the following forms:
class DamageSystem { class GlobalHealth { class Health { hitpoints=100; healthLevels[]= { { 1, {} }, { 0.7, {} }, { 0.5, {} }, { 0.3, {} }, { 0, {} } }; }; }; };
or
class DamageSystem { class GlobalHealth { class Health { hitpoints=100; healthLevels[]= { { 1, {""} }, { 0.7, {""} }, { 0.5, {""} }, { 0.3, {""} }, { 0, {""} } }; }; }; };